1. n. a disposition to behave in a certain way (view details)
2. n. a natural inclination (view details)
3. n. an inclination to do something (view details)

Meaning 1: (noun) a disposition to behave in a certain way
Usage Example(s): the aptness of iron to rust, the propensity of disease to spread
Synonym(s): aptness ( what does aptness stand for? )
propensity is a kind of: disposition ( what does disposition stand for? )

Meaning 2: (noun) a natural inclination
Usage Example(s): he has a proclivity for exaggeration
Synonym(s): leaning ( what does leaning stand for? ), proclivity ( what does proclivity stand for? )

Meaning 3: (noun) an inclination to do something
Usage Example(s): he felt leanings toward frivolity
Synonym(s): leaning, tendency ( what does tendency stand for? )
propensity is derived from: be given ( what does be given stand for? ), incline ( what does incline stand for? ), lean ( what does lean stand for? ), run ( what does run stand for? ), tend ( what does tend stand for? )

What do YOU think propensity stands for?